Sierra Marine Propeller Shaft Oil Seal

The Sierra Marine Propeller Shaft Oil Seal line offers replacement prop shaft seals (also called propeller shaft seals or lower unit oil seals) for outboard and stern drive lower units. These seals sit where the propeller shaft passes through the gear housing. They keep gear lube in and keep water out of the lower unit.

Key Features:

• Designed as aftermarket replacements for OEM propeller shaft oil seals
• Press-fit installation into the gear housing or prop shaft carrier
• Rubber sealing element, with a metal outer case on many designs, for a secure fit in the bore
• Helps protect gears and bearings from water intrusion and lubricant loss
• Part numbers cross-reference to common OEM and aftermarket numbers

Replacing worn prop shaft seals during lower unit service helps prevent gear oil leaks and water contamination, which can lead to costly gearcase damage. Sierra is a long-established marine parts brand. Its products carry a limited warranty against defects in workmanship.